JPS6111774A - Fixing device - Google Patents
Fixing deviceInfo
- Publication number
- JPS6111774A JPS6111774A JP13273584A JP13273584A JPS6111774A JP S6111774 A JPS6111774 A JP S6111774A JP 13273584 A JP13273584 A JP 13273584A JP 13273584 A JP13273584 A JP 13273584A JP S6111774 A JPS6111774 A JP S6111774A
- Authority
- JP
- Japan
- Prior art keywords
- recording paper
- roller
- fixing roller
- paper
- fixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2039—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat with means for controlling the fixing temperature
- G03G15/2042—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat with means for controlling the fixing temperature specially for the axial heat partition
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はヒータが内設される定着ローラと該定着ローラ
に圧博される加圧ローラとから成る熱ロー2方式の定着
装置に係シ小サイズの記録用紙送稿時に当該小サイズの
記録用紙の非通過部分となる前記定着ローラの両端部の
温度過昇を防止するための改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat roller two-type fixing device consisting of a fixing roller in which a heater is installed and a pressure roller applied to the fixing roller. The present invention relates to an improvement for preventing an excessive rise in temperature at both ends of the fixing roller, which are portions through which the small-sized recording paper does not pass when the small-sized recording paper is transported.
第1図は複写機等に用いられる従来の定着装置の一般的
構成を示す概念図であシヒータ1が内股される定着ロー
ラ2に加圧ローラ3が一定の圧力で圧接して配設されて
いる。係る従来の定着装置によれば前記定着ローラ2は
前記ヒータ1への通電による発熱によって予め所定の温
度に加熱されておシ当該定着ローラ2と前記加圧ロー2
3間を送稿される各サイズの記録用紙例えばA3および
A、に対し前記定着ロー22から伝えられる熱エネルギ
ーと前記加圧ロー23から加えられる圧力とにより当該
各サイズの用紙A3およびA6それぞれに転写されたト
ナー像の定着を可能にしている。FIG. 1 is a conceptual diagram showing the general configuration of a conventional fixing device used in copying machines, etc. In this figure, a pressure roller 3 is placed in pressure contact with a fixing roller 2 in which a shift heater 1 is folded. There is. According to such a conventional fixing device, the fixing roller 2 is heated to a predetermined temperature in advance by heat generated by energizing the heater 1.
The heat energy transmitted from the fixing roller 22 and the pressure applied from the pressure roller 23 to the recording sheets of each size, for example, A3 and A, are transferred between the three sizes, A3 and A6, respectively. This allows the transferred toner image to be fixed.
このような熱ローラ方式の定着装置では定着の品質維持
あるいは紙燃え防止のために前記定着ロー22の表面温
度の監視が重要であシこの点において従来は前記定着ロ
ーラ2に近接して例えば非−触型の赤外線方式等による
温度センサ4を設けこの温度センサ4の検出温度にもと
づき前記ヒータlへの通電を制御することによシ当該定
着ローラ2の表面温度を一定に保つようにしていた。通
常この温度センサ4は前記定着ローラ2上の前記各記録
用紙A3およびAsがともに通過する位置を監視範囲と
して配設され当該記録用紙A3およびAsに対する定着
の品質を維持できる程に充分間くまた当該個所で紙燃え
が発生する程に過昇しないような温度範囲を制御条件と
している。前述したように各記録用紙A3およびA、に
対する定着は前記定着ローラ2からの当該各記録用紙A
3およヒA sへの熱エネルギーの伝達によってなされ
るが前記定着ロー22の表面上においてこれら各記録用
紙A3およびA、が通過した個所としない個所では上記
熱エネルギーの伝達の度合に差がでるため当該定着ロー
ラ2の表面の温度分布が異なってくる。In such a heat roller type fixing device, it is important to monitor the surface temperature of the fixing roller 22 in order to maintain fixing quality or prevent paper burning. - A temperature sensor 4 using a tactile infrared method or the like is provided, and the surface temperature of the fixing roller 2 is kept constant by controlling energization to the heater l based on the temperature detected by the temperature sensor 4. . Normally, this temperature sensor 4 is disposed as a monitoring range at a position on the fixing roller 2 where each of the recording sheets A3 and As pass together, and the temperature sensor 4 is provided for a sufficient period of time to maintain the quality of fixing on the recording sheets A3 and As. The control condition is such that the temperature does not rise to the extent that paper burning occurs at the relevant location. As mentioned above, fixing to each recording paper A3 and A is performed by fixing the recording paper A3 and A from the fixing roller 2.
There is a difference in the degree of transfer of the thermal energy between the areas on the surface of the fixing row 22 where the respective recording sheets A3 and A have passed and the areas where they have not. Therefore, the temperature distribution on the surface of the fixing roller 2 becomes different.
第2図は上記従来の定着装置における定着ロー22の表
面の温度分布特性を示したものであシ横軸には当該定着
ロー22表面の位置また縦軸には温度を目盛っである。FIG. 2 shows the temperature distribution characteristics on the surface of the fixing roller 22 in the conventional fixing device.The horizontal axis is the position of the surface of the fixing roller 22, and the vertical axis is the temperature.
図中aは大きいサイズの記録用紙ここではA。In the figure, a is a large size recording paper.
の送稿時の温度分布特性を示しておシ尚該記録用紙A1
が前記定着ローラ2の表面全体を通過し上述した熱エネ
ルギーの伝達が平均的に行なわれるためその温度分布も
各位置で#丘は一様に保たれている。また同図すは小さ
いサイズの記録紙ここてはA5送稿時の温度分布特性し
ておシ前記定着ローラ2の表面上前記記録用紙A、の通
過部分では前述した如く平均的な熱エネルギーの伝達に
よってその表面温度は11は前記温度センサ4の制御条
件にかなった温度に保たれているが非通過部分にあたる
当該定着ローラ2の両端部T、およびT2ではこの熱エ
ネルギーの伝達が抑止されるために前記通過個所に比べ
異常な温度上昇を示している。Please indicate the temperature distribution characteristics when sending the paper.
passes over the entire surface of the fixing roller 2, and the above-mentioned thermal energy is transmitted evenly, so that the temperature distribution is kept uniform at each position. In addition, the figure shows the temperature distribution characteristics of a small-sized recording paper when feeding A5 paper.As mentioned above, the average thermal energy is Due to the transmission, the surface temperature 11 is kept at a temperature that meets the control conditions of the temperature sensor 4, but the transmission of this thermal energy is inhibited at both ends T and T2 of the fixing roller 2, which are non-passing parts. Therefore, the temperature rises abnormally compared to the passage point.
このように従来の転写装置では小サイズの記録用紙の送
稿時において前記定着ロー22の両端部すなわら当該小
サイズ記録用紙が通過しない個所でその表面温度が過昇
しすぎるために当該定着ローラ自身あるいは当該定着ロ
ー22の近傍に位置する剥離爪軸受は部材が過熱されて
その耐久寿命を極端に短かめるという問題′があった。As described above, in conventional transfer devices, when feeding small-sized recording paper, the surface temperature rises too much at both ends of the fixing row 22, that is, the area where the small-sized recording paper does not pass. There is a problem in that the peeling pawl bearing located near the roller itself or the fixing row 22 is overheated and its durable life is extremely shortened.
本発明は上記実状に鑑みてなされたものであり、小サイ
ズの記録用紙送稿時に当該記録用紙の非通過部分となる
前記定着ローラの両端部における温度過昇を防止でき、
当該定着ローラ、周辺機構部の長寿命化に寄与できる定
着装置を提供するととを目的とする。The present invention has been made in view of the above-mentioned circumstances, and is capable of preventing an excessive rise in temperature at both ends of the fixing roller, which are the portions through which the recording paper does not pass when feeding small-sized recording paper.
It is an object of the present invention to provide a fixing device that can contribute to extending the life of the fixing roller and peripheral mechanical parts.
そこで本発明では前記小サイズの記録用紙送稿時に非通
過部分となる前記定着ローラの両端部に対し同時に送風
可能である冷却用のファンを設け、当該小サイズ記録用
紙の送稿時には上記ファンによシ前記両端部を送風冷却
し、その温度過昇を防止することによシ上述した目的を
達成している。Therefore, in the present invention, a cooling fan is provided that can simultaneously blow air to both ends of the fixing roller, which are non-passable parts when the small-sized recording paper is transported. The above-mentioned objective is achieved by blowing air to both ends and preventing the temperature from rising excessively.
以下本発明の実施例を添付図面にもとづいて詳細に説明
する。第2図は本発明の一実施例を示す概念図であシヒ
ータ1が内設される定着ロー22近接し、該定着ローラ
2と加圧ローラ3との間で小サイズの記録用紙例えばA
6を送稿するときに前記定着ロー22の周面上において
前記記録用紙A、が通過しない部分すなわち前記定着ロ
ーラ2の両端部T1およびT!に対し同時に送風可能で
ある双筒部5を有する冷却ファン6が配設されている。Embodiments of the present invention will be described in detail below based on the accompanying drawings. FIG. 2 is a conceptual diagram showing an embodiment of the present invention, in which a fixing roller 22 in which a shift heater 1 is installed is close to a fixing roller 22, and a small-sized recording paper, e.g.
6, the portions on the circumferential surface of the fixing roller 22 through which the recording paper A does not pass, that is, both ends T1 and T! of the fixing roller 2. A cooling fan 6 having a twin cylinder portion 5 that can simultaneously blow air is provided.
また第4図は本発明に係る定着装置の制御回路主要部の
構成例を、示すブロック図であシ、以下この第4図を参
照してその制御動作を詳述する。FIG. 4 is a block diagram showing an example of the configuration of the main parts of the control circuit of the fixing device according to the present invention.The control operation thereof will be described in detail below with reference to FIG.
まず記録に先立ち扱者により使用する記録用紙のサイズ
指定がなされると紙サイズ設定回路7から社主制御回路
8およびファン駆動回路9へ前記サイズ指定に応じた紙
サイズ設定信号が送出される。今このサイズ指定が大サ
イズの記録用紙ここてはA、であるものとすると前記主
制御回路8では当該記録用紙A3の装置される給紙トレ
イのトリガローラを回動させて当該記録用紙A3をまず
図示しない搬送路中に送り込む。その後該主制御回路8
では予め定められた動作シーケンスにもとづきこの選択
搬送された記録用紙A3に画情報に応じたトナー像の転
写を行なわせるとともに一定時間後にこのトナー像の転
写された記録用紙A3が前記定着ローラ2と加圧ローラ
3間を通過する時に上述した如くの方法によってこのト
ナー像を前記記録用紙A3に定着させ図示しない排紙ト
レイに排紙させる。First, prior to recording, when the operator specifies the size of the recording paper to be used, a paper size setting signal corresponding to the size specification is sent from the paper size setting circuit 7 to the owner control circuit 8 and fan drive circuit 9. Assuming that this size designation is for a large size recording paper, here A, the main control circuit 8 rotates the trigger roller of the paper feed tray in which the recording paper A3 is loaded. First, it is sent into a conveyance path (not shown). Then the main control circuit 8
Then, based on a predetermined operation sequence, a toner image is transferred to the selectively transported recording paper A3 according to the image information, and after a certain period of time, the recording paper A3 to which the toner image has been transferred is transferred to the fixing roller 2. When passing between the pressure rollers 3, this toner image is fixed on the recording paper A3 by the method described above and is ejected to a paper ejection tray (not shown).
このとき前記定着、ローラ2の表面全体が前記記録用紙
A3の通過部分となるため、その表面湯度は例えば第5
図aの温度分布特性に示す如くほぼ一様とな9極部的特
に前記定着ローラ2の両端部Tl+T2においてのみ高
温になるようなことはない。従って前記ファン駆動回路
9では前記大サイズの記録用紙A3指定時には前記ファ
ン6を駆動せず送風させないように制御する。At this time, since the entire surface of the fixing roller 2 becomes the part through which the recording paper A3 passes, the surface hot water temperature is, for example, 5th.
As shown in the temperature distribution characteristic in FIG. 1A, the temperature does not become high only at the nine poles, especially at both ends Tl+T2 of the fixing roller 2, which are almost uniform. Therefore, the fan drive circuit 9 controls the fan 6 so as not to drive the air when the large size recording paper A3 is specified.
一方前記サイズ指定が小サイズの記録用紙ここてはA、
である場合には前記主制御回路8は当該記録用紙AI+
が装填されている給紙トレイのトリガローラを回動させ
当該記録用紙A6を搬送路中に引き出した後上述したと
同様にこの記録用紙A、に画情報に応じたトナー像を転
写させその後前記定着ローラ2と加圧ロー23間とを通
過させることによシ該トナー像の定着を実行させる。こ
のとき前記定着ロー22の表面上において点線で示す部
分が前記記録用紙AIの通過部分となるが、この部分は
上述した温度センサ4によって監視され当該記録用紙A
6へ前記トナー像を品質よく定着するのに適した充分高
い温度であシしかも当該記録用紙A6に紙燃えを生じさ
せる程には高くはない温度となるように制御されている
。しかしながらこの記録用紙As送稿時にはその形状か
ら前記定着ロー22の表面上に非通過部分が生じこの部
分すなわち当該定着ロー22の両端部T1およびT鵞で
は熱伝達がなされる媒体を持たないため前記通過部分に
比べ異常な高温となることが予想される。従って前記フ
ァン駆動回路9では上述した/」・サイズ記録用紙As
の指定信号を受信した場合には前記ファン6を駆動し前
記双筒部5全通して送風することによって前記定着ロー
22の両端部T、およびT!を同時に冷却する。この時
の送風量および送風タイミングは上述した両端部T1お
よびT鵞が当該定着ロー22自身および周辺機構部に熱
的損傷を与える程の温度まで過昇することがな・く、し
かも前記記録用紙A6の通過部分において良好な定着に
影響する程低くなシすぎないように前記定着ローラ2の
表面の温度分布が例えば第5図すに示すように、その表
面一体でほぼ同様の温度分布となるように実験的に設定
することが望ましい。また本発明は用いる記録用紙が多
種類であシ非常通過部分の量がその都合異なるような場
合においても前記冷却用のファン6による送風位置、送
風量を適宜調整することにより上述したと同様の効果を
持たせることができる。On the other hand, the recording paper for which the size specification is small is A.
In this case, the main control circuit 8 controls the recording paper AI+.
After rotating the trigger roller of the paper feed tray loaded with the recording paper A6 and pulling out the recording paper A6 into the conveyance path, a toner image corresponding to the image information is transferred to the recording paper A6 in the same manner as described above. The toner image is fixed by passing between the fixing roller 2 and the pressure roller 23. At this time, the part indicated by the dotted line on the surface of the fixing row 22 becomes the part through which the recording paper AI passes, and this part is monitored by the temperature sensor 4 mentioned above.
The temperature is controlled to be high enough to fix the toner image on the recording paper A6 with good quality, but not so high as to cause paper burn on the recording paper A6. However, when this recording sheet As is fed, there is a non-passing portion on the surface of the fixing roller 22 due to its shape, and this portion, that is, both ends T1 and T of the fixing roller 22 does not have a medium for heat transfer. It is expected that the temperature will be abnormally high compared to the area where it passes. Therefore, in the fan drive circuit 9, the above-mentioned /'' size recording paper As
When a designation signal of T! is received, the fan 6 is driven to blow air through the entire double cylinder portion 5, thereby reaching both ends T of the fixing row 22, and T! are cooled at the same time. At this time, the air flow rate and air blowing timing are set such that the temperature of both end portions T1 and T1 does not rise to such a level as to cause thermal damage to the fixing row 22 itself and the surrounding mechanisms, and furthermore, In order to ensure that the temperature distribution on the surface of the fixing roller 2 is not too low to affect good fixing in the area where the A6 passes, the temperature distribution on the surface of the fixing roller 2 is almost the same as shown in FIG. 5, for example. It is desirable to set this experimentally. Furthermore, even when there are many types of recording paper to be used and the amount of the emergency passing portion varies depending on the circumstances, the present invention can achieve the same effect as described above by appropriately adjusting the position and amount of air blown by the cooling fan 6. It can have an effect.
以上説明したように本発明の定着装置によれば小サイズ
記録用紙送稿時に非通過部分となる定着ローラの両端部
に同時に送風可能なファンを設は当該小サイズ記録用紙
送稿時にはこのファンによシ前記両端部を適当に冷却す
るようにしたため当該両端部の温度が当該、定着ローラ
自身および周辺i構等に熱的損傷を与える程に過昇する
のを確実に防止でき、当該各部の長寿命化に寄与できる
という優れた効果を奏する。As explained above, according to the fixing device of the present invention, a fan capable of blowing air simultaneously is installed at both ends of the fixing roller, which is the part that does not pass when small-sized recording paper is fed. Since both ends are properly cooled, the temperature at both ends can be reliably prevented from rising to the extent of causing thermal damage to the fixing roller itself and the surrounding structures, and the temperature of each part can be prevented. It has the excellent effect of contributing to longer life.
第1図は従来の定着装置の描成例を示す概念図、第2図
はこの従来装置の定着ローラ表面における各サイズの記
録用紙送稿時の温度分布を示した図、第3図は本発明の
一実施例を示す定着装置の概念図、第4図は本発明に係
る定着装置の制御回路の主要部を示すブロック図、第5
図は本発明の定着装置の定着ローラ表面における各サイ
ズの記録用紙送稿時の温度分布を示した図である。
1・・・ヒータ、2・・・定着ローラ、3・・・加圧ロ
ーラ、4・・・温度センサ、5・・・双筒部、6・・・
冷却ファン、7・・・紙サイズ設定回路、8・・・主制
御回路、9・・・ファン駆動回路、a・・・犬サイズ用
紙定着時における定着ローラの温度分布曲線、b・・・
小サイズ用紙定着時における定着ローラの温度分布曲線
。
第1図
T2
第3図
第4図Figure 1 is a conceptual diagram showing a drawing example of a conventional fixing device, Figure 2 is a diagram showing the temperature distribution on the surface of the fixing roller of this conventional device when recording paper of each size is fed, and Figure 3 is a diagram showing a drawing example of a conventional fixing device. FIG. 4 is a conceptual diagram of a fixing device showing an embodiment of the invention; FIG. 4 is a block diagram showing the main part of the control circuit of the fixing device according to the invention;
The figure shows the temperature distribution on the surface of the fixing roller of the fixing device of the present invention when recording paper of each size is fed. DESCRIPTION OF SYMBOLS 1... Heater, 2... Fixing roller, 3... Pressure roller, 4... Temperature sensor, 5... Double cylinder part, 6...
Cooling fan, 7...Paper size setting circuit, 8...Main control circuit, 9...Fan drive circuit, a...Temperature distribution curve of fixing roller when fixing dog size paper, b...
Temperature distribution curve of the fixing roller when fixing small size paper. Figure 1 T2 Figure 3 Figure 4
Claims (1)
紙の定着を行う定着ローラを具備した定着装置において
前記小サイズ記録用紙が通過しない部分を冷却する冷却
ファンを設けたととを特徴とする定着装置。What is claimed is: 1. A fixing device comprising a fixing roller for fixing at least two types of recording paper of different sizes, each comprising a cooling fan for cooling a portion through which the small-sized recording paper does not pass.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13273584A JPS6111774A (en) | 1984-06-27 | 1984-06-27 | Fixing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13273584A JPS6111774A (en) | 1984-06-27 | 1984-06-27 | Fixing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6111774A true JPS6111774A (en) | 1986-01-20 |
Family
ID=15088367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13273584A Pending JPS6111774A (en) | 1984-06-27 | 1984-06-27 | Fixing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6111774A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6432568U (en) * | 1987-08-20 | 1989-03-01 | ||
EP0406892A2 (en) * | 1989-07-07 | 1991-01-09 | Canon Kabushiki Kaisha | Image fixing apparatus and image forming apparatus |
JPH03233588A (en) * | 1990-02-09 | 1991-10-17 | Canon Inc | Fixing device |
JPH04313913A (en) * | 1990-06-11 | 1992-11-05 | Ifm Electron Gmbh | Electronic switch device |
US6347829B1 (en) | 1999-11-24 | 2002-02-19 | Nissan Motor Co., Ltd. | Roof construction for vehicle using thermoplastic resin roof panel |
JP2002365963A (en) * | 2001-06-07 | 2002-12-20 | Canon Inc | Thermal fixing machine |
US9229380B2 (en) | 2012-03-29 | 2016-01-05 | Kyocera Document Solutions Inc. | Fixing device and image forming apparatus |
US9645533B2 (en) | 2012-04-24 | 2017-05-09 | Konica Minolta, Inc. | Image forming apparatus with cooling unit for cooling non-sheet passing region |
-
1984
- 1984-06-27 JP JP13273584A patent/JPS6111774A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6432568U (en) * | 1987-08-20 | 1989-03-01 | ||
EP0406892A2 (en) * | 1989-07-07 | 1991-01-09 | Canon Kabushiki Kaisha | Image fixing apparatus and image forming apparatus |
JPH03233588A (en) * | 1990-02-09 | 1991-10-17 | Canon Inc | Fixing device |
JPH04313913A (en) * | 1990-06-11 | 1992-11-05 | Ifm Electron Gmbh | Electronic switch device |
US6347829B1 (en) | 1999-11-24 | 2002-02-19 | Nissan Motor Co., Ltd. | Roof construction for vehicle using thermoplastic resin roof panel |
JP2002365963A (en) * | 2001-06-07 | 2002-12-20 | Canon Inc | Thermal fixing machine |
US9229380B2 (en) | 2012-03-29 | 2016-01-05 | Kyocera Document Solutions Inc. | Fixing device and image forming apparatus |
US9645533B2 (en) | 2012-04-24 | 2017-05-09 | Konica Minolta, Inc. | Image forming apparatus with cooling unit for cooling non-sheet passing region |
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